package com.enjoyor.soa.traffic.util.helper;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class PingHelper {
	
	public static boolean ping(String ipAddress) throws Exception {
        int  timeOut =  3000 ;  //超时应该在3钞以上        
        boolean status = InetAddress.getByName(ipAddress).isReachable(timeOut);     // 当返回值是true时，说明host是可用的，false则不可。
        return status;
    }
    
    public static void ping02(String ipAddress) throws Exception {
        String line = null;
        try {
            Process pro = Runtime.getRuntime().exec("ping " + ipAddress);
            BufferedReader buf = new BufferedReader(new InputStreamReader(
                    pro.getInputStream()));
            while ((line = buf.readLine()) != null)
                System.out.println(line);
        } catch (Exception ex) {
            System.out.println(ex.getMessage());
        }
    }
    
    public static Map<String,Object> ping(String ipAddress, int pingTimes, int timeOut) {
    	Map<String,Object> pingMap = new HashMap();
    	
        BufferedReader in = null;  
        Runtime r = Runtime.getRuntime();  // 将要执行的ping命令,此命令是windows格式的命令  
        String pingCommand = "ping " + ipAddress + " -n " + pingTimes    + " -w " + timeOut;  
        try {   // 执行命令并获取输出  
         //   System.out.println(pingCommand);   
            Process p = r.exec(pingCommand);   
            if (p == null) {    
                return null;   
            }
            in = new BufferedReader(new InputStreamReader(p.getInputStream()));   // 逐行检查输出,计算类似出现=23ms TTL=62字样的次数  
            int connectedCount = 0;   
            String line = null; 
            int delay_total = 0;
            while ((line = in.readLine()) != null) { 
            	if(line.contains("TTL=")){
	                String temp = line.replace("<", "=").replace("<", "=");  
	                String delay = temp.split("=")[2].split("ms")[0];
	                delay_total +=Integer.valueOf(delay);
            	}
                connectedCount += getCheckResult(line);   
            }   // 如果出现类似=23ms TTL=62这样的字样,出现的次数=测试次数则返回真  
            float packet_loss = (pingTimes-connectedCount)/pingTimes;
        	pingMap.put("packet_loss", packet_loss*100);
        	
            if(connectedCount == 0){
            	pingMap.put("response_time", -1);
            }else
            	pingMap.put("response_time", delay_total/connectedCount);
            return pingMap;  
        } catch (Exception ex) {   
            ex.printStackTrace();   // 出现异常则返回假  
            return null;  
        } finally {   
            try {    
                in.close();   
            } catch (IOException e) {    
                e.printStackTrace();   
            }  
        }
    }
    //若line含有=18ms TTL=16字样,说明已经ping通,返回1,否則返回0.
    private static int getCheckResult(String line) {  // System.out.println("控制台输出的结果为:"+line);  
        Pattern pattern = Pattern.compile("(\\d+ms)(\\s+)(TTL=\\d+)",    Pattern.CASE_INSENSITIVE);  
        Matcher matcher = pattern.matcher(line);  
        while (matcher.find()) {
            return 1;
        }
        return 0; 
    }
    
    public static boolean isIP(String addr)  
    {  
        if(addr.length() < 7 || addr.length() > 15 || "".equals(addr))  
        {  
            return false;  
        }  
        /** 
         * 判断IP格式和范围 
         */  
        String rexp = "([1-9]|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5])(\\.(\\d|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5])){3}";  
          
        Pattern pat = Pattern.compile(rexp);    
          
        Matcher mat = pat.matcher(addr);    
          
        boolean ipAddress = mat.find();  

        return ipAddress;  
    } 
}
